Signaling-horn.



J. A. & E. L. LANNERT.

SIGNALING ORN.

APPLICATION FILED IAN-29,1915

Patented Mar. 28, 1916.

iomitnnag concern:

known that we. J l nx Anni LAN- .1: and EAim Lnuor Laxxniir, both citiin at the United Stat es,residingin East land.fin/the county of Cuyahoga and in new and usefulImprovements in Sig.- ialin lilorns. of j wliich't he following is a ill lear, and complete disclosure. l

This invention relates to signa uch as are [adapted for use on automobiles or s an a r theflsound is produced by vibrating a diaphragm by electro-magnetici mechanism.

The ct-tsof"tlns inventlonare tolpro l h a gnallng device which 1s horn or s1 amt, ccnnpact, and. attractive; whiclrcan l rdilueed at low is tedf hith r E this invention will apthisspccificationin which thesame referfence ch lime; artsthroughout the variou 1" is a horizontal view looking at the lid of the coniplete horn;"Fig. Zis a lltlllltll sectionali v iew taken on the line of 1; Fig. 318a top plan view \titl the cover and amplifying member reiovedz F isgaperspective view of the irmatureshowing the. impactfingers. Fig.

nethod of applying the tension .mem- Fig. 6 is a side view. showing another alte 'nativdmethod f. arrangingfthe tension member? jhe drawings, 1' representsa; dished ea er plate which may i be the frame as shown; Re'sting on the flat portion of the dished cover plate the diaphragm 2which 18 hold y; the diaphragm ti ght around its entire iferencealringfiis placedthereon'and Brews passing through holes in the ring and diaphragmffasten the samelsecurely to said dished; cover plate. I as will beflater deother functions. jSecurely fastened to the iaphragmjandnear the center thereof is a tension member 7.

'h h itles with'the inipact fingers T lon an armat as, the latter being carried by a spring UNITEDSTATE Joni: ADAMLANNERT. A D EARLL RQY LANNERT, or EAST CLEVELAND, omo.

i 3 speibificatidn f Letters lat'ent.

qtte 'of 01nd,: havejointly invented oer;

ling, horns,

l vehicles, and.particularly tojhorns of the character above indicated .ll'ljYlllCll cost andfis readily ad earfiinthe specifications and cl'aimsbelow. Referring toythe drawings forminga part araeters are used to designate the s VlGWS,

a\fperspective view showing an alterna made of an elastic material; In orderto scribed. the screws 4, in and (3" also perform.

T his member has a head 1 en ga ges, at two diametrically opposite At modification of this arrangement PATENT OFFICE. v

' sfenatmemorm.

Patented Mar. 28, 1916.

v Application filed anuary 29, 1915. Serial No. 5,090.

would be to fasten the tension member to the armature.

The electromagnet assembl consists of a coil 5) wound upon or slippe over the core 10, the magnetic path being completed by the yoke 11 and the armature 8. The yoke 11 has two projections at its ends which project sidewise for the purposeof mounting the assembly and also to give the magnetic path a larger area at the air-gap. It

will be noticed that the magnetic flux divides when entering the yoke, about one-half entering each side.

A contact spring 12 has a contact point fastened at one end, which is normally pressed against the contact point on the armature 8. The contact spring 12 is thoroughly insulated from the metallic parts by the two insulating blocks 13 and 14 and the air space between the oversize hole in the contactspring 1'2 and thescrew 4.

The screw 4 passes through holes in the 1 projection of yoke 11,-in the two insulating blocks 13 and.1-1, in the contact spring 12, in one, of the holes of the ring 3 and diaphragm 2 and is screwed into the dished cover plate 1, thus fastening these members rigidly together. The screw 3 passes through holes in the other projection of yoke 11, in the metallic spacing block 15, in thepivot spring 8 for the armature S, in the spacing block 16 (shown of an insulating material toperform another function), and one of the holes of the ring 3 and diaphragm 2 and is screwed into the dished cover plate 1, thus rigidly fastening these members together in operative relation to each other.

The c0ver17 and amplifying member 18 are fastened together and theassembled unit is held in place by the perforated disk 19 normally deflected by the screw 20, thus holding these members securely to the body of the horn and allowing them to beeasily removed for inspection.

Assuming the flexible lead wire 21 to be connected to the positive terminal of=the electrical source, theelectrical circuit will he tothe binding screw 22 where connection is made with one of the ends of coil 9. The other end of coil 9 is connected to the insulated contact spring by soldering to a small projection thereon or by any other convenient method. The contact spring 12 and the armature 8 are normally in connection with each other. The circuit from the armatureto the connection with the lead "wire 23 under the binding screw 6 isthrough the-metallic parts of the horn. Obviously,

when a current is passed through the coil 9 a magnetic flux Wlll be set up and thus attract the armature. The impact fingers 7 on the armature 8 may normally rest against the head of the tension member 7 or may be a short distance away, the effect being a difference in the loudness'of the sound. When the impact fingers are-in contact with the head of the tension member 7 a further movement of the armature whether caused by magnetic attractionor inertia will deflect the diaphragm. a An insulated adjusting stop screw 24 is so set that the electric current will be interru ted and the armature will then be returned by the force of the deflected diaphragm and the armature pivot spring. When the armature returns to its original position the contacts close the circuit thus causing the magnet to attract the armature again. a This operation takes place with great frequency so that the successivedeflections of the diaphragm vibrate the surrounding air with sufficient frequency to producea loud sound. The sound passes through the amplifying member 18 and emits from the perforations in the disk 19.

- Having thus described our invention, what we claim is 1. Ina signaling horn, the combination with a frame plate and'a horn cooperating therewith to form an amplifying chamber, of a diaphragm secured to said frame plate, a yoke disposed within the amplifying chamber and spaced forwardly from said diaphragm, means for securing said yoke in place, a magnet supported in said yoke, an

Copies of this patent may be obtained for five cents each, by addressing the yoke,

armature for said magnet in front of the diaphragm, circuit breaking means also in front of the diaphragm and cooperating with said armature, and connections between said armature and the diaphragm.

2. In a signaling horn, the combination with a disked frame plate, and a horn forming an amplifying chamber, of, a yoke located in said amplifying chamber and spaced forwardly from said dished frame plate, a diaphragm between the frame plate and yoke, a magnet supported by said yoke, devices between the -dia )hragm and magnet and cooperating with the latter to form a rheotome, and connections between said devices and the diaphragm.

-3. In a signaling horn, the combination witha dished frame plate, and a horn structure forming an amplifying chamber, of a yoke located within said chamber forwardly from the frame plate, s'aid yoke having lateral extensions spaced from and secured to the frame plate, a magnet carried by said means securing said yoke extensions to the frame plate. a diaphragm secured to the frame plate, anarmature supported between said diaphragm and magnet, circuit breaking means cooperating with said armature, and a tension device connecting the diaphragm with said armature In testimony whereof, we hereunto affix our signatures in the presence of two witnesses. 1

JOHN ADAM LANNERT. EARL LEROY LA-NN-ERT. Witnesses L. G. Hn'rc-iIIsoN,

W. H. EVERETT.

Commissioner of Patents,

Washington, D. 0. 

